JavaScript alert () __java

Defined:

The alert () method displays a warning box with a specified message and an OK button.

Grammar:

Alert (Message)

Tips:

The message dialog box is provided by the system, so the style font may be different in different browsers.

The message dialog box is exclusive, which means that no other action can be performed until the user clicks the button on the dialog box.

The message dialog box can often be used to debug a program.

Example:

<div>
Search by name
<input type= "text" value= "" id= "input"/>
<a href= "javascript:void (0);" onclick= "Search ()" class= "button" > Search </a>
</div>

Take the value of <input/>

<script type= "Text/javascript" >

function Search () {
Alert ($ ("#input"). Val ());
}

</script>

The result is as shown in figure: